期刊
MATERIALS RESEARCH EXPRESS
卷 6, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab561b
关键词
CdS/GQDs composites; GQDs contents; optical property; photoelectric response
资金
- National Natural Science Foundation of China [51204129, 51874219]
Cadmium sulfide/ graphene quantum dots (CdS/GQDs) composites were fabricated by a simple one-step solvothermal method using cadmium acetate and thiourea as precursors for Cd and S, respectively. GQDs were compounded with CdS, which resulted in a decrease in zeta potential. The lattice fringes of 0.34 nm and 0.33 nm were ascribed to the (002) direction of GQDs and CdS, respectively. The UV absorption spectrum of CdS/GQDs composites presented a red-shifted, and the photoluminescence intensity of CdS/GQDs composites declined upon the addition of GQDs. The photoelectric properties of CdS/GQDs composites were significantly stronger than those of pure CdS. The relationships between photoelectric responses and the contents of GQDs were investigated. The photocurrent density reached a maximum of 3.58;;10(?6) A cm(?2) when the content of GQDs was 0.4 wt%, but the photocurrent density of pure CdS was 0.15;;
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